Road-grader



(No Model.) 2 Sheets-Sheet 1.

H. K. LEEDHAM.

- RU'AD GRADER.

N0. 603,220: f Patented A131226, 1898.

(No Model.) v zsheetssheenz L H. K. LEEDHAM.

ROAD GRADBR.

10.603220 PmntedApr. 26,1898..

UNrT-ED SITA-TESA PATENT rricn.

HoRATIo K. .LEEDHAM or MOUNT PLEASANT, IowA.

'ROAD-GRADER.

SPECIFICATION forming part of Letters Patent No. 603,220, dated April 26, 1898.

Applioationled January 18, 1897. Serial No. 619,645. v (No model.) l

.To a/ZZ whom it may concern:

Be it known that I, HoRATIo K. LEEDHAM, a citizen of the UnitedStates of America,pand a resident of Mount Pleasant, in the county of Henry and State of Iowa, have invented a new and useful Road-Grader, of which the following is a speCiGatiOn.

This invention relates to improvements in road graders such as have been patented heretofore to'J ames Holland and the Mount Pleasant Road Grader Company, and involves some of the features of the application of H. K. Leedham, led December 19, 1895, and serially numbered 572,619.

The object of this invention is to provide improved means for oscillating the scraperbar on a vertical axis and improved means for attaching shifting mechanismto the draft-bar.

My invention consists of, and the objects of my invention are carried out by, the construction, arrangement, and combination of elements hereinafter set forth, pointed out in my claims, and illustrated by the accompanying drawings, in which- 'n Figure 1 is a perspective elevation longitudinally of the machine. Fig. 2 is a rear elevation in detail of the band-wheels and mechanism for connecting the same to the supporting-bars of the scraper-blade. Fig. 3 is a plan of crank mechanism and bevel-gears whereby the supporting-rods of the scraperblade are operated. Fig. 4 is an elevation, partly in section, of the mechanism employed to connect the draftrrods to the forward trucks. Fig. 5 is a plan of a portion of the machine, including the draft-bars, segment-bars, truss, circle-bar, and operating mechanism attached thereto. Fig. 6 is an elevation of mechanism employed to lock the circle-bar to one of the segment-bars. Fig. 7 is a rear elevation of a drum-shaft and worm-gear employed to shift the draft-bars and scraper-blade laterally. Fig. 8 isa sectional elevation on the indicated line 8 8 of Fig. 7. A

In the construction of the machine as shown I preferably employ oppositely-located and longitudinally-parallel-disposed sidebeamslO 11, which beams are preferably made of channel-bars and rest at their front ends upon the bolster 12 and at their rear ends upon standards 1313.

upon and fixed to the rear axle 14 of the ma- The standards 13 13 are mounted loop or eye 21 on its forward end embracing the bail 18 and normally resting in the halfloop 19. The drawrod 2O has a straight body portionv and a screw-threaded rear end, on which is mounted an adjusting-nut 22. The body portion of the draw-rod 2O traverses apertures formed in the central portion of a head-block 23, and an expansive coil-spring 24 is mounted on said draw-rod between the rear face of the head-block and the adjustingnut 22, which spring forms a cushion for the draft when applied to the head-block.

Draft bars or beams 2526 are provided and are rigidly secured at their forward ends to and upon opposite sides of the headblock 23. The draft-bars extend rearwardly from the vhead-block to a transverse plane slightly in advance of the wheels 15 15, and in their rearward extension diverge in opposite directions from the longitudinal axis of the machine. lThe draft-bars are arched or goosenecked immediately in the rear of the points of attachment to the head-block and there is located beneath said bars immediately at the rear of the arches therein a segment-bar 27. The segment-bar 27 is rigidly clamped to the draft-bars and is provided with downwardly and rearwardly extending lugs or seats 28, arranged at the ends and at intermediate points of the length/of said bar. A similar segment-bar 29 of greater `length than the bar 27 :is oppositely positioned on the draft-bars 25 26 at such a distance to the rear of the bar 27 as may be necessary to permit of the introduction therebetween of a circle-bar of the desired diameter. The segment-bar 29 is provided with downwardly and forwardly extending lugs of a like character to those indicated at 28, and it maybe observed that all of the lugs on the segment-bars radiate from a common axis, which is the axis of each segment. The segment-bar 29 also is clamped rigidly to the draft-bars, and by reason of the IOO clamps employed to mount the segment-bars said bars maybe adjusted to some degree relative to each other or readily removed or replaced.

A circle-bar 30 is provided which comprises an annular pla-te of a thickness corresponding approximately to the thickness of the segment-bars and designed to rest upon the lugs of the segment-bars and be confined against upward movement by the draft-bars. The circle-bar 30 is confined against forward or rearward movement by the segment-bars and is supported against lateral movement and central lexure by lugs 31 31, fixed to and proj ecting downwardly and inwardly from a truss 33, which truss is clamped to the draft-bars approximately midway between the segmentbars. The circle-bar 30 is provided with a series of vertical apertures 35. Bearingplates 36 are mounted on the central portion of the truss 33, and horizontally positioned therein longitudinally of the machine is a worm-shaft 34. A short shaft 37is vertically positioned for rotation in the central portions of the truss 33 and bears on its central portion a worm-gear meshing with the worm 34. The lower end of the shaft 37 is angular in cross-section and is seated in an angular aperture in the central portion of a cross-bar 3S, the ends of which cross-bar are rigidly connected to the circle-bar 30, the cross-bar extending diametrically of said circle-bar. A cross-bar 3S connects the channel bars or beams 10 11 at a point above and at the rear of the circle-bar, and a bracket 39 is fixed to said cross-bar and extends upwardly and forwardly therefrom. An eyebolt 40 is swiveled in the bracket 39, and a shaft 41 or rod is loosely mounted in the eye of said eyebolt and is provided at its upper end with a handwheel 42. The rod 41 is angular in cross-section and is designed to enter an angularbore in a sleeve 43, which sleeve is connected at its lower end by a link 44 to a bifurcated-end portion of the worm-shaft 37.

An angle-plate 45 is fixed to the upper face of the segment-bar 29 and projects over and upon the rear portion of the circle-bar. The angle-plate 45 is apertured with registering holes located in the orbit of travel of the apertures 35 in the circle-bar 39. A bent rod 46 is provided and the vert-ical portion thereof is seated in the apertures in the an gle-plate 45 and is of such length as to extend through said angle-plate and into one or another of the apertures 35 in the circle-bar. A collar 47 is rigidly mounted on the vertical portion of the rod 46 and an expansive coil-spring 48 is mounted on the rod between said collar and the upper portion of the angle-plate and normally tends to depress said rod into engagement with the circle-bar. The horizontal portion of the rod 46 extends across a standard 49, fixed to the an gle-plate, and said standard is provided with two notches in its upper edge at different altitudes, which notches are connected by an inclined portion of the edge.

The outer end portions of the truss 33 are connected by rods 50 51 to crank-arms 52 53, respectively, which crank-arms are located on opposite sides of the machine parallel with each other. The crank-arm 52 is connected rigidly to the outer end portion of the rockshaft 54, seated in bearings mounted on the channel bar or beam 19 and extending across the same. A face-wheel 55 is rigidly mounted on the inner end of the rock-shaft 54, and is of such formation as to be engaged by a pinion 55 adjacent thereto. The pinion 55 is mounted on a shaft 55h, extending longitudinally of the beam 10, and a bevel gear-wheel 55c is mounted on the rear end thereof and meshes with a bevel-pinion on a short shaft 5G, carrying a hand-wheel 5S. A crank-arm 53 is mounted on a similar shaft on the beam 11 and is operated by a similar gear and hand wheel.

A shaft 59 is positioned horizontally parallel with and adjacent to the rear axle 14 of the machine and is provided at each end with a drum GO. A worm-wheel (il is mounted rigidly on the shaft 59 and is engaged by a worm 62 on a vertical shaft G3, seated in the rear portion of the frame ot' the machine and operated by a hand-wheel 64 on its upper end. A chain 65 is connected at its rear end to the right drum GO, extends forward therefrom around a flanged sleeve GG, mounted on a standard 67, which standard is seated in an inclined position in the machine-frame and extends from said sleeve obliquely forward. rlhe rear ends of the draft-bars 25 2G are connected by a segment-bar 57, bowed or curved rearwardly, and to the rear extremity or apex of the segment-bar 57 the forward end portion of the chain G5 is secured. A chain GS is connected at its rear end to the left drum GO, extends forward therefrom around a sleeve similar to the sleeve GG and mounted in the same manner, and extends from said sleeve to a point of attachment conjunctively with the chain G5 to the segment-bar 57.

The worm-gear, sleeves, and standards and the chains operated thereby are the same in this application as in one of the patents` to Holland and the application previously mentioned herein, with the exception that in this instance the forward ends of the chains are conjunctively attached to the apex of the segment-bar.

A seat 70 is mounted on the forward portions of the beams 10 11, and a foot-rest 7l is located below and in front of the seat. An axle 7 2 is fixed to and supports the fifth-wheel 16, and a tongue or other draft mechanism is attached to the axle. A platform 73 is supported on or adjacent to the rear axle 14 of the machine and is employed to support an attendant who operates the scraping mechanism.

Two beams 74 are fixed to and extend downwardly and forwardly from opposite sides of the circle-bar 30, and a scraper-blade 75 is fixed to the lower forward ends of said beams IOO IIO

and is thereby rigidly connected to the circlebar. Y

I claim as my invention- 1. In a road-grader,a truss,a circle-bar revolubly mounted in said truss, a scraper-blade Carried by said circle-bar, a cross-bar mounted on said circlebar and provided with a central angular aperture, a shaft journaled in the central portion ofthe truss and having an angular end portion engaging in the angular aperture of the cross-bar, a pinion on said shaft and a manually-operated Worm engaging said pinion to oseillate the shaft, crossbar, circle-bar and scraper-blade.

2. In a road-grader, the combination of a I-IORATIO K. LEEDHAM.

Witnesses:

C. M. SNYDER, H. JEFFERSON. 

